Tablet is a solid dosage form in which powder, crystalline or granular form of drug is compressed in a disk or molded. It is the most frequently used means of administering a drug. The main reasons behind formulation of different types of tablets are to create a delivery system that is relatively simple and inexpensive to manufacture.

Here are tablets classified by their route of administration and by the type of drug delivery system they represent within that route.

1. Oral Tablets for Ingestion: Oral tablet is designed to release the drug within the gastrointestinal tract for absorption into the circulation or more rarely for a local effect. It is usually swallowed or dissolved in water before taking.

a. Standard compressed tablets
b. Multiple compressed tablets
  • Compression coated tablet
  • Layered tablet
  • Inlay tablet
c. Modified release tablet
d. Delayed action tablet
e. Targeted tablet

Read more:
Oral Tablets for Ingestion (Part I) 
Oral Tablets for Ingestion (Part II) 
Oral Tablets for Ingestion (Part III)

2. Tablet Used in Oral Cavity The tablets under this group are aimed release. Active pharmaceutical Ingredient in oral cavity or to provide local action in this region.

a. Lozenges and troches
b. Sublingual tablet
c. Buccal tablet
d. Dental cones
e. Mouth dissolved

Read More: Tablet Used in Oral Cavity 

3. Tablet Administered by other Routes : These tablets are administered by other route except for the oral cavity and so the drugs are avoided from passing through gastro
intestinal tract.

a. Vaginal tablet
b. Implants

Read more : Tablet Administered by other Routes

4. Tablet Used to Prepare Solution : tablet that dissolves completely in liquid to produce solution of definite concentration.

a. Effervescent tablet
b. Hypodermic tablet
c. Soluble tablet

Read more : Tablet Used to Prepare Solution